Mozilla/5.0 (X11; Linux i686; rv:12.0) Gecko/20120430 Thunderbird/12.0.1
I tried exactly the same with no success and after a day I decided to
drop it. I think it's not possible, it doesn't seem feasible to write to
disk (for instance to print a plot to a file) out of multiple processes,
I believe it's not necessarily related to Octave... But if you succeed I
really would like to know...